OTG Adapter for Samsung Galaxy S2 I9100，
 
1)OTG USB Switch Micro 5P Adapter Accessory
2)OTG USB Switch mini 5P Adapter Accessory

       Description of USB adapter:
One of the most common non-USB ports is theserial port. This kind of cable-port combination routinely has pins of varying numbers on cables that fit in corresponding numbers of holes in ports. Even some of the most recently manufactured computers haveserial portsfor connecting peripherals like printers and scanners.

         A problem arise if you buy a newercomputerand want to connect it to an older printer. The computer likely has a USB port， but the printer probably has a serial port. This be the case with newer computers as well. In order to connect the two devices， you need a USB adapter.

         The USB adapter connects USB-port devices to non-USB-port devices. A USB adapter usually has aUSB cableon one end and a non-USB cable on the other end. Just plug the correct end into the correct port， and you overcome what would seem to be an insurmountable problem. The USB adapter solves that problem for you.

        Another common kind of USB adapter these days is one that connects anor otherMP3player to its power charger. A portable music player will likely have not a USB port， but rather some kind of serial port. This is where the USB adapter comes in handy. The cable that comes with the music player will have the serial cable on one end and a USB cable on the other end. The charger device that connects to anelectrical outletwill have a USB port， into which you plug the charging cable in order to juice up the music player. In this case， the charging device itself is the USB adapter.